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Accumulated Other Comprehensive (Loss) Income (Tables) | 3 Months Ended
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Mar. 31, 2022
Accumulated Other Comprehensive (Loss) Income |
Schedule of components of accumulated other comprehensive income (loss) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Unrealized Gains |  | ​ | ​
​ | ​ | ​ | ​ | ​ | and Losses | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | on Securities | ​ | ​ | ​
​ | ​ | Benefit | ​ | Available | ​ | ​ | ​
(Dollars in thousands) | ​ | Plans | ​ | for Sale | ​ | Total
Three Months Ended March 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2021 | ​ | $ | 57 | ​ | $ | (21,203) | ​ | $ | (21,146)
Other comprehensive loss before reclassifications | ​ |  | — | ​ |  | (272,810) | ​ |  | (272,810)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | — | ​ |  | — | ​ |  | —
Net comprehensive loss | ​ |  | — | ​ |  | (272,810) | ​ |  | (272,810)
Balance at March 31, 2022 | ​ | $ | 57 | ​ | $ | (294,013) | ​ | $ | (293,956)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended March 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2020 | ​ | $ | (151) | ​ | $ | 47,740 | ​ | $ | 47,589
Other comprehensive loss before reclassifications | ​ |  | — | ​ |  | (48,620) | ​ | ​ | (48,620)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | — | ​ |  | — | ​ |  | —
Net comprehensive loss | ​ |  | — | ​ |  | (48,620) | ​ |  | (48,620)
Balance at March 31, 2021 | ​ | $ | (151) | ​ | $ | (880) | ​ | $ | (1,031)

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